Door construction



March 7, 1933. v s. K. SMITH 1,900,079

noon CONSTRUCTION Original Filed May 24, 1929 Patented Mar. 7, 1933 STANLEY K. SMITH, OF WESTFIELD,

MASSACHUSETTS, ASSIGNOR To THE B. SMITH COMPANY, OF WESTFIELD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS noon CONSTRUCTION Original application filed May 24, 1929, Seria1 No. 365,629. Divided and this application filed Ja uar 2 1,

I 1930. Serial No, 422,381.. I

This invention relates to an improved con struction of doors and retaming means therefor and is particularly applicable or adaptable to clean out doors for heaters or the like.

This application is a division of my copending application, Serial No. 365,629, filed May These frames preferably are provided with flange on the dished body por i l 75 of the the inner ends of lugs 76. The lower edge of In accordance with the present invention, the clean out doors may be provided with inner shield portions which cooperate with the door frame upon the boiler or heater in facilitating the attachment of the doors into the frame. Each door may also carry a single manually controllable member, such as a handle or knob which may be moved to a selected position to lock the doonin place or which may be turned to another position to permit the ready release of the door and removal of the same from the door frame or heater,

thus permittingconvenient access to the in terior of the heater or housing. 7

In theaccompanying drawing,

Fig. 1 is-an elevational View of the front portion ofa heater showing clean out doors applied thereto;

Fig. 2 is a central vertical section through the door and related parts shown in Fig. 1; and

Fig. 3 is a sectional detail on line 33 of Fig.

In the drawing, the boiler is designated by the numeral 1 and may be provided with any suitable fluid containing headers 2 or the-like which are disposed within the housing. A

fuel door 9 may be arranged in the usual manner below the clean out doors 70. The boiler may be provided with door frames 71 disposed about each of the door openings =50 and secured to the body portion of the boiler.

inturned lower flanges or ribs 73 and with continuous plane faces 74: each of which engage a perimetric surface at the outer edge of a door 70, which is provided by a marginal door.

The body portion of the door is provided with suitable inwardly extending lugs 7 6, and a fire shield 77 is held by bolts 78 against 7 readily released from its locked sive construction for closure that a clean" out door shield 77 preferably is provided with an ine w'ardly and downwardly curved lip 81 thatis adapted to hook'o'ver'the inwardly extending rib 73 at the bottom of frame 71. A hand knob 80 is pivotally mounted in the plate 7 5 and projects through a suitable opening in the shield 77. This knob carries an eccentrically mounted lug 79 which is engageable with a downward extension 83 of the upper part of the door frame 71.

When the door is locked inits normal position, the 'lip 81 is hooked over the lower flange 7 3 and the lug 77 is engaged with the rear of the flange extension '83, thus holding the perimetric face of the dished member in engagement with the face 74 of the door frame. WVhen the knob is rotated, lug 79 may be disengaged from the flange extension 83 and the lip 81 lifted out of engagement with the flange 73, so that the door is position by the mere turning of the knob 80 and the lifting of lip 81 out of engagement with the joining portion of the door frame. Obviously the lug 79 may be of comparatively heavy and sturdy construction, while the lip 81"may be of a width substantially corresponding to that of the lower part of the door. Accordingly dependable andsturdy means are provided for firmly retainingthe door in place, while adjustment of the bolts 78 compensates for slight wear or warping of the fire shield.

Any suitable means may be employed for mounting the door frame upon the boiler housing. Thus as illustrated in Fig. 3, I have shown screw elements 91 which may be threaded into nut members 96 that are im-' bedded in the housing wall, these screw members passing through lugs or enlarged portions of an outwardly-projecting flange I 92 upon the door frame.

It is thus evident that the present invention provides a Sturdy, simple, and inexpenmembers, such boilers or heaters, and of this character may be readily removed from its tion or quickly returned to locked in. place.

asclean out door for the same and operative posi- V ried I claim:

1. Apparatus of the class described co1nprising a housing, an opening therein, a closure member for said opening, a shield upon said member, a frame about the opening, said closure being engageable with said frame, said shield having a projection engaging the inside of said frame, and a pivoted locking member extending through said closure and shield and having a lug movable into engagement with another part of the frame.

2. Apparatus of the class described comprising a housing, an opening therein, a closure member for said opening, a shield upon said member, a frame about the opening, said closure being engageable with said frame, said shield having a downwardly curved lip engaging behind the inner surface of the lower part of the frame, and. a single locking member extending through said closure and shield and having an eccentric lug normally engaging the inner sur face of the upper part of the frame but releasable therefrom upon the turning of the locking member, whereby the lip may be lifted out of engagement with the frame and the closure removed.

8. In combination, a housing having an opening therein, a closure for the opening, said closure having a portion providing a surface to engage the housing, and an inner shield, an edge of said shield having an interfitting engagement with the housing ad joining the lower part of the opening, and a movable locking member holding the upper part of the closure against the housing, the edge of the shield being liftable out of engagement with the housing when the locking means is released.

4. Apparatus of the class described comprising'a housing having an opening therein, a closure member for said opening, said closure member including a dished body portion providing a continuous marginal flange engageable with the housing about the opening, and a shield within the dished member, said shield having an offset lip, a flange upon the housing engageable between said lip and the body portion of the closure member, and means carried by the closure to lock an edge remote from the lip against the hous 5. Apparatus of the class described comprising a housing having an opening therein, a closure member for said opening, said closure member including a dished body portion providing acontinuous marginal flange engageable with the housing about the opening, and a shield within the dished member, said shield having an oflset lip projecting beyond the edge of the flange, and a part carried by the housing engageable between the lip and the adjoining flange, and means carby the closure to lock it in the, position wherein the lip and flange engage said part.

6. Apparatus of the class described comprising a housing having an opening therein, a closure member for said opening, said closure member including a dished body portion providing a continuous marginal flange, and a shield within the dished member, said shield having an offset lip projecting beyond the edgeof the flange, a frame disposed about the opening and mounted on the housing said frame being engageable with the flange upon the closure member, said frame having a rib engageable between the lip and the adjoining portion of the closure member, and locking means to hold the opposite edge of the closure againstthe frame.

7. Apparatus of the class described comprising a housing having an opening therein, a closure member for said. opening, said closure member including a'dished body portion providing a continumis marginal flange, a shield within the dishedmember, having an offset lip projecting beyond the edge of the flange, a frame disposed about the opening and mounted on the housing, said frame being engageable with the flange upon the closure member, said frame having a rib engageable between the lip and the adjoining body portion of the closure member, locking means to hold the opposite edge of the closure against the frame, said locking means comprising a rotatable member carried by the body portion of the closure member, and a lug extendin therefrom and movable into *r-s engagement with a part of the frame.

Signed by me at l/Vestlield,Massachusetts December 1929.

this 31st day of V STANLEY K. SMITH.

said shield 

